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Your Position :Home->Past Journals Catalog->2009年46 No.1

Impact of time distribution of meteorological elements on population of the 5thgeneration of Diaphania pyloalis
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Key Words:Diaphania pyloalis, meteorological element, time distribution
Abstract:

The effect of meteorological elements on amount of 5th generation of Diaphania pyloalis Walker was analyzed with integral regression method. The results showed that there was great variation in the effect of time distribution of meteorological elements. The element with greatest impact was relative humidity, daily average temperature secondly, and precipitation and sunshine played decorating roles for humidity and temperature. High temperature and humid weather in early August, and high temperature and dry weather in mid_August may promote the increasing of 5th generation of D. pyloalises. Humid weather and moderate low temperature in early September and dry weather and moderate high temperature in mid_September were beneficial for the increasing of 5th generation of D. pyloalises.Humid  environment was advantageous to egg survival and hatching, and dry environment is advantageous to the survival of larvae and pupae. Tested with 11_year record, it fitted significantly. The deviation between estimated values and investigation in the field in 2007 was 13.6%, which proved that the simulation with mathematical model can accurately reflect natural population dynamics of 5th generation of D. pyloalises.

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